The National Cooperative Highway Research Program has announced the award of Project No. 18-07, entitled Prestress Losses in Pretensioned High-Strength Concrete Bridge Girders, to the University of Nebraska-Lincoln. The Principal Investigator is Dr. Maher K. Tadros. For further information about
HOW TO ACHIEVE A HIGHER MODULUS OF ELASTICITY
John J. Myers, The University of Missouri-Rolla The modulus of elasticity of concrete is an important mechanical property since it affects the camber of prestressed concrete beams at release of prestressing strands and deflections under superimposed dead and live loads.
HPC FOR DURABILITY OF THE CONFEDERATION BRIDGE
Laszlo Dunaszegi, Stantec Consulting Ltd., Calgary The Confederation Bridge is an 8.1-mile (13-km) long bridge across the Northumberland Strait between Prince Edward Island and New Brunswick, Canada. Opened in 1997, the bridge consists of gravity-based piers and a single-cell box-girder
HPC AND INNOVATIVE DESIGN ENSURE LONG-TERM DURABILITY
Alexander K. Bardow, Massachusetts Highway Department Experience has shown that bridges with continuous beams and rigid frame abutments exhibit better long-term durability than bridges with leakage-prone roadway joints. Thus, when the existing Great Road Bridge (State Route 119) over the
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Question and Answer
Question: With HPC, should I specify compressive strength at 56 days rather than the traditional age of 28 days? Answer: The use of a 56-day age for the measurement of concrete compressive strength was introduced into the building industry many